AIRCONDITIONING - PRESSURIZATION

通報

問題一覧

Hot air “FAULT” light illuminates on the air conditioning panel:

the hot air press reg. valve closes and the trim air valves close

In case of Air Conditioning System Controller dual lane failure:

the related Pack is lost, and the hot air pressure regulating valve and associated trim air valves closes.

During normal flight the Avionics Ventilation System controls the temperature of the cooling air by:

passing air through a skin heat exchanger

The RAM AIR switch should be used:

only when delta P is less than 1psi

Air Conditioning System Controller single lane failure:

no effect, as the second lane takes over

Each Pack is consist of heat exchangers, compressor and turbine. The purpose of the turbine is to:

drives the compressor, cooling air fan and also expands and cools the air.

The Mixer Unit connects to cabin fans, LP ground connector, emergency ram air inlet, Pack 1 and 2. The statement is:

True

Hot air press reg. valve failed open:

no effect

Bleed air supplied from the APU (APU bleed valve open), the pack flow is automatically selected to:

high

Trim air valve, each one optimizes the temperature by:

adding hot air

Hot air pressure regulating valve:

regulates the pressure of hot air, tapped upstream of the packs

Pack flow control valve:

pneumatically operated and electrically controlled

The temperature selectors are located in:

the cockpit overhead panel

Pack flow may be selected from:

the cockpit overhead panel

Engine flow demand, when the heating or cooling demand in one zone cannot be satisfied:

the minimum idle is increased automatically

What is the maximum norm cabin alt:

8000 ft

What is the maximum negative differential pressure for the cabin:

-1 psi

Is it possible to use simultaneously Packs and LP Ground Unit during long stops in a hot airfield:

Trim air valves are modulated by:

air conditioning system controllers

The mixing unit is connected to:

packs, cabin air, emergency ram air inlet and LP ground connector

Once set to “ON” the air conditioning packs operate:

automatically and independently of each other

Emergency ram air inlet, when set to “ON”, the ram air valve will open:

when delta P < 1 psi and the Ditching pb is not selected

Hot-Air Pressure-Regulating Valve is controlled by the:

Air Conditioning System Controller 1

Conditioned air is distributed to:

cockpit, forward and aft cabins

The cabin zone temperature sensors are ventilated by the air extracted by the lavatory and galleys fans:

True

Temperature control is automatic and is regulated by:

air conditioning system controllers

The Hot-Air Pressure-Regulating Valve closes automatically when:

either is correct

The Hot-Air Pressure-Regulating Valve closes automatically when:

cockpit trim air valve or cabin trim air valves fail

When the pack flow control selector is positioned to HI, air flow is:

120% of normal

When using APU bleed to supply the Packs, with the Pack Flow Selector at LO, the Pack air flow is:

120% of normal

The pack flow control valve closes automatically in case of:

pack overheat, engine fire push button released, engine start, ditching pb pressed

Trim air valve failure

the optimized temperature regulation of the corresponding zone is lost

There are how many trim air valves?

3 - one for the cockpit and two for the cabin

During landing run, packs ram air inlet flaps open when the speed is less than:

70 kts ( after 20 sec delay )

When APU is supplying the Packs, the air conditioning system controller sends a demand signal to increase air flow when a zone temperature cannot be satisfied:

to the APU ECB

The ditching switch when selected ON sends a closure signal to:

all are correct

In flight, with cabin pressure controller 1 in use, if it fails:

transfers automatically to cabin pressure controller 2

In normal operation, pressurization is:

fully automatic

The outflow valve is powered by:

one of three electric motors

During ground function operation, the outflow valve is:

fully opened

To see the position of the outflow valve, it is necessary to call ECAM:

CAB PRESS Page

Two identical, independent, automatic digital pressurization controllers are used for system control:

one controller active, one in standby

Which controller generates excess cabin altitude and pressure outputs for ECAM indication in manual mode:

N°1

When Ram Air pb is set to ON, the outflow valve will open 50% when delta P is:

< 1 psi

The purpose of the safety valves is to avoid:

both are correct

The safety valves are operated:

pneumatically

When landing elevation is set to AUTO, the landing elevation is sent to the controller from:

FMGC

When Mode SEL is set to MANUAL, the outflow valve is controlled by signals sent via controller 1 or 2:

False

On ECAM CAB PRESS page, the outflow valve indicator changes to amber if:

valve open (more than 95% during flight)

On ECAM CAB PRESS page, the safety valve indication changes to amber if:

one safety valve is open

On ECAM CAB PRESS page the cabin altitude indication changes to red, when the cabin altitude is:

> 9, 550 ft

Following a SYS 1 fault:

System 2 takes over automatically without crew action

Cabin pressurization starts at:

take-off power selection

The safety valves open at:

8.6 psi

In automatic mode, cabin pressurization is optimized by using information from:

FMGS landing field elev, dest. QNH and static pressure information

During normal flight and with skin temp. below + 35 °C, the avionics ventilation system controls the temperature of the cooling air by:

passing air through a skin heat exchanger

When the Ram Air pb set to “ON” the emer. ram air inlet valve will open:

when ∆P < 1 psi and ditching is not selected

The Residual Pressure Control Unit (RPCU) automatically depressurized the aircraft in case of abnormal residual pressure, it automatically opens the outflow valve when:

the OFV is not fully open + both CPCs fail + a/c on ground + all engines shutdown

When the RAM AIR pb is set to ON the outflow valve:

opens about 50% only when delta P is less than 1psi

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